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When we can tuna I use my three burner camp chef. Running two pressure cookers at a time. When two are done I throw the third one on while the other two cool and release pressure. Then we repeat. It's just like smoking with a finicky smoker, one guy sits by the cooker watching the pressure gauges and flame at all times. It's another good all day Beer drinking sport!
I'd never use a pressure cooker in my house... Scratch that when I lived on my boat I did use a small one at times. Oh and I do use my cream can for cooking too...